Fluid-pressure riveting-machine.



No. 823,273. PATENTED JUNE 12, 1906.

E. E. HANNA. FLUID PRESSURE RIVETING MACHINE.

APPLIOATION FILED MAY 15. 1903.

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Specification of Letters Patent.

v Patented June 1r2, 1908.

Application filed May 15,190.3. Serial No1 157,284.

To all whom t may concern:

Be it known that I, ELMER ELsWoRTH -.HANNA, a citizen of the United States residing at Chica o, in the county of Cook an State of Illinois, ave invented certain new and useful Improvements in Fluid-Pressure Rivetin Machines, of which the following is a speciigication.

The principal object of this invention is to provide a simple, economical, and eflicient Huid-pressure riveting-machine with a systen of compound levers for transmitting ower and motionfrom the attached engine-cy inder to the riveting-tools quickly at first and nally, or during the riveting operation, in a substantially uniform manner, as will more fully hereinafter appear.

The invention consists principally in a fluid, pressure riveter in which there are combined a portable bifurcated supporting-frame, a plunger slidably mounted 1n the head of one arm thereof and bearing a l'desired tool, a main operating-lever ivotally mounted Vin the supportin -frame, ink mechanism pivotally connecte with the main o erating-lever and the slidable plunger, a flui -pressure cylinder pivotally connected with the frame of the machine, a reciprocating piston mounted in such cylinder and provided with a' projecting piston-rod, link mechanism pivotally secured to the frame of the machine and to the piston-rod, and an intermediate lever pivotally secured to the piston-rod and to the main operating-lever. v

The invention consists, further and finally, in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a machine with the plun-` ger portion in section as it a pears When constructed in accordance Wit these improvements, and Fig. 2 a plan view of the same looking at it from above.

l In the art to which this invention relates it is well 'known that it has long been desired to provide a fluid-.pressure riveter with a system of compoundY levers interposed between the prime mover and the riveting-tool in such a manner as to obtain a substantially rapid movement at first and nally a substantially uniform motion at reduced speed, but greatly increased transmission of pressure during the riveting operations. To provide such a machine, this invention is principally designed..

-In constructing a Huid-pressure riveter in accordance with these improvements I make a bifurcated frame portion a, substantially `(l-shaped When viewed in side elevation, as shown in Fig. '1. Slidably mounted in the head in the upper arm of the C-shaped frame 1s a plunger c, provided with a rivetin or other o erating tool d, screw-threade therein. T e lowei` arm of the C-shaped frame opposite the operating-tool is provided /with an anvil e. In place of this riveting-tool and anvil a punch and die may be used, so

that the punching of holes in metal sheets may be accomplished just as easily with this machine as the headin of rivets, all of which will' be understood an appreciated by those skilled in the art. To operate this plun er, a main operating-leverf 1s provided and ulcrumed at gin an upper extension of the machine-frame substantially in line with and above the slidable plunger, Link mechanism t is also provided and .pivotally connected with the forward projecting end of the main operating-lever and with the plunger mechanism, so that Yduring the movements .of said o erating-lever motion is transmitted to the s idable plunger, and thereby to the riveting or other operating tool.

To transmit power and motion to the main Operating-lever, a fluid-pressure cylinder 'i 1s provided and pivotally secured in the frame of the machine at j, so that it may oscillate thereon to accommodate the movements of the other parts, as will more full hereinafter appear. A reciprocating piston 73e is movably mounted in this fluid-pressure cylinder and provided with a projecting piston-rod Z. An intermediate link m is provlded and pivotally connected with the rearward projecting end of the main operating-lever and with the forward end of the reciprocating iston. To control or govern the actions of t e intermediate link, a link or links n are provided and pivotally secured to the intermediate link and reciprocating piston-rod at their' common pivotal points and also to the frame of the machine at p.. I

By the foregoing arrangement or system of levers it will be seen that the extreme outer end of the piston is during its reciprocations not only compelled to reciprocate,`but that Y the forward end is also compelled 'to move in the arc of a circle the center of which is at p and that thereby the'plunger, through the instrumentality of the intermediate link m, main operating-lever and link h is given a rapid movement atst or until it reachesl IOO Elo

lapproximately the last live inches of `its stroke or during the riveting operation, When it is 'ven substantially uniform movement at re uced speed, but eatly increased pressure, all of which Will e understood and appreciated by those skilled in the art.

To sustainthe machine in position so that the portableframe portion, With the lower anvil portion, is moved while the plunger remains substantially stationary, the plunger mechanism is provided wi th a pair of rojecting studs q, extending to each side of t e machine (see Fig. 2) and out through elongated openings t in the frame-head. Hangermechanism in the shape of chains u or the like is rovided andsecured to these projecting stu s and to a second set of studs w on the fluid-pressure cylinder, so that the parts may be sustained in position and the desired movement obtained. By this arrangement the rivets may be placed in position With the reliminarilyformed head uppermost and t e cylindrical part projectin down through the plates, thus enabling t e operator to place as many rivets preliminarily in position as he may desue.

l. In a riveting-machine, the combination with a supporting-frame having a sliding plunger therein, of means for moving said plunger at a relatively rapid and graduallydecreasing speed and for continuing the final movement at a substantially uniform speed and maximum pressure, said means including a main lever fulcrumed in the frame above the plunger, a link connection between one end of said lever and the plunger, a link pivoted to the frame, a link connection between said link and the opposite end of said lever, and means for moving the linkpivoted to -the frame about its pivot.w

2. In a Huid-pressure riveter, the combination with a supporting-frame having a sliding plunger therein, of means for neving sai plunger at a relatively rapid and-graduallydecreasing speed and for continuing the final movement at a substantially uniform speed and maximum pressure, said means includp nections between said piston and plunger to j effect the movement thereof, and hanger mechanism for suspending said frame oonnected to said plunger and said Huid-pressure cylinder.

4. In a fluid-pressure riveter, a portable frame provided With an anvil, a plunger movably sup orted within the frame above the anvil an provided With studs projecting laterally lto each side of the frame of the machine, a fluid-pressure cylinder supported in the frame, va piston therein, lever-and-link -connections between said piston and the plunger, and suspension-chains having their ends secured respectively to the laterallyprojecting studs of the plunger and to the fluid-pressure cylinder.

ELMER `ELSVVORTH HANN. Witnesses THOMAS F. SHRIDAN, HARRY I. CROMER. 

